GSView is a viewer for various document formats including Postscript, PDF, XPS, EPUB (version 2, no DRM), CBZ, JPEG, and PNG files. It leverages the capabilities of both Ghostscript and MuPDF.

More details can be found on

GSView (versions 6 and above) are produced by Artifex Software LLC, and should not be confused with GSview (versions below 6) which was produced by Russell Lang at Ghostgum Software Pty Ltd.